Boil the potatoes, remove the skin, mash it and keep it aside.
Cook the sweet corn kernels without water and let it cool
Cut the onions and chillies into very fine pieces
Heat the oil in a pan and saute the onions till they turn transparent. Now add all other ingredients except ghee and cook for 2 minutes.
Switch off the fire and let it cool
Prepare the charcoal barbeque
Take one ball of this mixture and press it around the skewer and arrange it on the prepared grill/ charcoal barbeque, apply ghee on it and and let it cook for 5-10 minutes.(This timing is for charcoal barbeque only)
Let it brown on one side and then flip it to the other side and again cook it for till it browns
Serve it hot!